Mills, Grimes help No. 21 Houston beat East Carolina 69-59

Houston's Quentin Grimes (24) is challenged by East Carolina's Miles James (42) during the first half of an NCAA college basketball game in Greenville, N.C., Wednesday, Jan. 29, 2020. (AP Photo/Karl B DeBlaker)

Houston's Justin Gorham (4) drives the ball around East Carolina's Jayden Gardner (1) during the first half of an NCAA college basketball game in Greenville, N.C., Wednesday, Jan. 29, 2020. (AP Photo/Karl B DeBlaker)

East Carolina's Charles Coleman (32) fouls Houston's Justin Gorham (4) while trying to block a shot during the first half of an NCAA college basketball game in Greenville, N.C., Wednesday, Jan. 29, 2020. (AP Photo/Karl B DeBlaker)

Houston's DeJon Jarreau (3) drives to the basket past East Carolina's Brandon Suggs (4) during the second half of an NCAA college basketball game in Greenville, N.C., Wednesday, Jan. 29, 2020. (AP Photo/Karl B DeBlaker)

East Carolina coach Joe Dooley protests a call during the second half of the team's NCAA college basketball game against Houston in Greenville, N.C., Wednesday, Jan. 29, 2020. (AP Photo/Karl B DeBlaker)

Houston coach Kelvin Sampson talks with DeJon Jarreau during the second half of the team's NCAA college basketball game against the East Carolina in Greenville, N.C., Wednesday, Jan. 29, 2020. (AP Photo/Karl B DeBlaker)

East Carolina's Tristen Newton (2) works the ball against Houston's DeJon Jarreau (3) during the first half of an NCAA college basketball game in Greenville, N.C., Wednesday, Jan. 29, 2020. (AP Photo/Karl B DeBlaker)

Houston's Fabian White Jr. (35) grabs a rebound next to East Carolina's Jayden Gardner (1) during the second half of an NCAA college basketball game in Greenville, N.C., Wednesday, Jan. 29, 2020. (AP Photo/Karl B DeBlaker)

East Carolina's Jayden Gardner looks to pass the ball while defended by Houston's Brison Gresham (55) during the first half of an NCAA college basketball game in Greenville, N.C., Wednesday, Jan. 29, 2020. (AP Photo/Karl B DeBlaker)

Houston's Quentin Grimes (24) drives to the basket past East Carolina's J.J. Miles (11) during the second half of an NCAA college basketball game in Greenville, N.C., Wednesday, Jan. 29, 2020. (AP Photo/Karl B DeBlaker)

Houston's Caleb Mills (2) drives the ball around East Carolina's Brandon Suggs during the first half of an NCAA college basketball game in Greenville, N.C., Wednesday, Jan. 29, 2020. (AP Photo/Karl B DeBlaker)